code: def testInstanceCheckerCache(self):
      checker = dispatch.MakeInstanceChecker(tuple)
      MyTuple = collections.namedtuple(
          "MyTuple", ["a", "b"]
      )  # Subclass of tuple
  
      self.assertEqual(checker.cache_size(), 0)
      self.assertEqual(checker.Check(5), NO_MATCH)
      self.assertEqual(checker.cache_size(), 1)  # cache miss
      self.assertEqual(checker.Check(12), NO_MATCH)
      self.assertEqual(checker.cache_size(), 1)  # cache hit
      self.assertEqual(checker.Check(1.3), NO_MATCH)
      self.assertEqual(checker.cache_size(), 2)  # cache miss
      self.assertEqual(checker.Check([1]), NO_MATCH)
      self.assertEqual(checker.cache_size(), 3)  # cache miss
      self.assertEqual(checker.Check((1,)), MATCH)
      self.assertEqual(checker.cache_size(), 4)  # cache miss
      self.assertEqual(checker.Check((1, 2, 3)), MATCH)
      self.assertEqual(checker.cache_size(), 4)  # cache hit
      self.assertEqual(checker.Check(MyTuple(1, 2)), MATCH)
      self.assertEqual(checker.cache_size(), 5)  # cache miss
      self.assertEqual(checker.Check(MyTuple(3, 4)), MATCH)
      self.assertEqual(checker.cache_size(), 5)  # cache miss
      self.assertEqual(checker.Check(()), MATCH)
      self.assertEqual(checker.cache_size(), 5)
  
imports: import collections
  import numpy
  from tensorflow.python.framework import _pywrap_python_api_dispatcher
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 2 for calling the PythonTypeCheckerTest obj's underlying member method code with example usage: obj.testInstanceCheckerCache() without return types